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SN75124

TRIPLE LINE RECEIVER

 

 

SLLS058B – SEPTEMBER 1973 – REVISED MAY 1995

1

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

D

Meets or Exceeds the Requirements of

IBM

 System 360 Input/Output Interface

Specification

D

Operates From Single 5-V Supply

D

TTL Compatible

D

Built-In Input Threshold Hysteresis

D

High Speed . . . Typical Propagation Delay

Time = 20 ns

D

Independent Channel Strobes

D

Input Gating Increases Application

Flexibility

D

Designed for Use With Dual Line Driver

SN75123

D

Designed to Be Interchangeable With

Signetics N8T24

     

description

The SN75124 triple line receiver is specifically designed to meet the input/output interface specifications for IBM

System 360. It is also compatible with standard TTL logic and supply voltage levels.

The SN75124 has receiver inputs with built-in hysteresis to provide increased noise margin for single-ended

systems. An open line affects the receiver input as does a low-level input voltage, and the receiver input can

withstand a level of – 0.15 V with power on or off. The other inputs are in TTL configuration. The S input must

be high to enable the receiver input. Two of the line receivers have A and B inputs that, if both are high, hold

the output low. The third receiver has only an A input that, if high, holds the output low.

See the SN751730 for new IBM 360/370 interface designs.

The SN75124 is characterized for operation from 0

°

C to 70

°

C.

FUNCTION TABLE

INPUTS

OUTPUT

A

B†

R

S

OUTPUT

Y

H

H

X

X

L

X

X

L

H

L

L

X

H

X

H

L

X

X

L

H

X

L

H

X

H

X

L

X

L

H

† B input and last two lines of the function table are

applicable to receivers 1 and 2 only.

Copyright 

©

 1995, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

 

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

2

3

5

6

7

8

16

15

14

13

12

11

10

9

1A

1B

2R

2S

2A

2B

2Y

GND

V

CC

1S

1R

1Y

3A

3S

3R

3Y

D OR N PACKAGE

(TOP VIEW)

IBM is a trademark of International Business Machines Corp.

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SN75124

TRIPLE LINE RECEIVER

 

 

SLLS058B – SEPTEMBER 1973 – REVISED MAY 1995

2

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

logic symbol

2Y

15

12

11

10

6

5

4

3

2

1

14

3Y

1Y

9

7

13

3A

3S

3R

2B

2A

2S

2R

1B

1A

1S

1R

1

&

&

&

† This symbol is in accordance with ANSI/IEEE Std 91-1984

and IEC Publication 617-12.

1

logic diagram (positive logic)

3A

3S

3R

2B

2A

2S

2R

1B

1A

1S

1R

9

7

13

1Y

2Y

3Y

12

11

10

6

5

4

3

2

1

15

14

schematic (each receiver)

58 

13, 7, 9

Y

800 

4 k

4 k

A

B‡

1, 5, 12

2, 6

S

15, 4, 11

16

VCC

14, 3, 10

R

8

GND

. . . VCC bus

To Other

Receivers

V

V

V

V

To Other

Receivers

‡ B input is provided on receivers 1 and 2 only

Resistor values shown are nominal.

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SN75124

TRIPLE LINE RECEIVER

 

 

SLLS058B – SEPTEMBER 1973 – REVISED MAY 1995

3

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, V

CC 

(see Note 1) 

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Input voltage, V

I

: R input with V

CC

 applied 

 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

R input with V

CC

 not applied 

 6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

A, B, or S input 

 5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Output voltage, V

O

 

 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Output current, I

O

 

±

100 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Continuous total dissipation 

See Dissipation Rating Table

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Operating free-air temperature range, T

A

 

0

°

C to 70

°

C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Storage temperature range, T

stg

  – 65

°

C to 150

°

C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 

260

°

C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: Voltage values are with respect to network ground terminal

DISSIPATION RATING TABLE

PACKAGE

TA 

 25

°

C

DERATING FACTOR

TA = 70

°

C

PACKAGE

A

POWER RATING

ABOVE TA = 25

°

C

A

POWER RATING

D

950 mW

7.6 mW/

°

C

608 mW

N

1150 mW

9.2 mW/

°

C

736 mW

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.75

5

5.25

V

High level input voltage VIH

A, B, or S

2

V

High-level input voltage, VIH

R

1.7

V

Low level input voltage VIL

A, B, or S

0.8

V

Low-level input voltage, VIL

R

0.7

V

High-level output current, IOH

– 800

µ

A

Low-level output current, IOL

16

mA

Operating free-air temperature, TA

0

70

°

C

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SN75124

TRIPLE LINE RECEIVER

 

 

SLLS058B – SEPTEMBER 1973 – REVISED MAY 1995

4

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Vhys

Hysteresis voltage (VIT + – VIT –)

R

VCC = 5 V,

TA = 25

°

C

0.2

0.5

V

VIK

Input clamp voltage

A, B, or S

VCC = 5 V,

II – 12 mA

– 1.5

V

VI(BR)

Input breakdown voltage

A, B, or S

VCC = 5 V,

II = 10 mA

5.5

V

VOH

High level output voltage

VIH = VIHmin,

VIL = VILmax,

2 6

V

VOH

High-level output voltage

IH

IH

,

IOH = – 800 

µ

A,

IL

IL

,

See Note 2

2.6

V

VOL

Low level output voltage

VIH = VIHmin,

VIL = VILmax,

0 4

V

VOL

Low-level output voltage

IH

IH

,

IOL = 16 mA,

IL

IL

,

See Note 2

0.4

V

II

Input current at maximum input voltage

R

VI = 7 V

5

mA

II

Input current at maximum input voltage

R

VI = 6 V,

VCC = 0

5

mA

IIH

High level input current

A, B, or S

VI = 4.5 V

40

µ

A

IIH

High-level input current

R

VI = 3.11 V

170

µ

A

IIL

Low-level input current

A, B, or S

VI = 0.4 V,

VIR = 0.8 V

– 0.1

– 1.6

mA

IOS

Short-circuit output current†

– 50

– 100

mA

ICC

Supply current

All inputs = 0.8 V

72

mA

ICC

Supply current

All inputs = 2 V

100

mA

† Not more than one output should be shorted at a time, and duration of the short circuit should not exceed one second.

NOTE 2: The output voltage and current limits are characterized for any appropriate combination of high and low inputs specified by the function

table for the desired output.

switching characteristics, V

CC

 = 5 V, T

A

 = 25

°

C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH

Propagation delay time, low-to-high-level output from R input

See Figure 1

20

30

ns

tPHL

Propagation delay time, high-to-low-level output from R input

See Figure 1

20

30

ns

PARAMETER MEASUREMENT INFORMATION

VCC

2.6 V

84.5 

1N3064

Output

5 k

CL =

30 pF

See Note B

TEST CIRCUIT

Pulse

Generator

(see Note A)

 

5 ns

90%

1.5 V

Input

10%

0

2.6 V

VOH

Output

VOL

tPHL

tPLH

VOLTAGE  WAVEFORMS

 5 ns

90%

1.5 V

10%

1.5 V

1.5 V

NOTES: A. The pulse generator has the following characteristics: ZO 

 50 

, PRR 

 5 MHz, duty cycle = 50%.

B. CL includes probe and jig capacitance.

Figure 1. Test Circuit and Voltage Waveforms

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SN75124

TRIPLE LINE RECEIVER

 

 

SLLS058B – SEPTEMBER 1973 – REVISED MAY 1995

5

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

VO – Output V

oltage – V

V

O

VI – Input Voltage – V

ÏÏÏÏ

ÏÏÏÏ

ÏÏÏÏ

VCC = 5 V

No Load

TA = 25

°

C

RECEIVER

OUTPUT VOLTAGE

vs

INPUT VOLTAGE

0

4

2

0

0.4

0.8

1

1.4

1.8

0.5

1

1.5

2

2.5

3

3.5

ÏÏÏÏ

ÏÏÏÏ

VIT –

ÏÏÏ

ÏÏÏ

VIT+

0.2

0.6

1.2

1.6

Figure 2

APPLICATION INFORMATION

1/2 SN75123

95 

95-

 Coaxial Cable

A

B

C

D

E

F

95 

Strobe

A

B

Y

1/3 SN75124

Figure 3. Unbalanced Line Communication Using  SN75123 and SN75124

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Copyright 

©

 1998, Texas Instruments Incorporated